Analysis of oxidizer salt mixtures by electrospray ionization mass spectrometry
Abbreviated Journal Title
Rapid Commun. Mass Spectrom.
AMMONIUM-NITRATE; Biochemical Research Methods; Chemistry, Analytical; Spectroscopy
Binary aqueous mixtures of NaNO(3), KNO(3) and NaClO(4) oxidizers were analyzed using electrospray ionization mass spectrometry. Sodium nitrate solutions were observed to form doubly charged clusters of the type [(NaNO(3))(n)2Na](2+) and [(NaNO(3))(n)2NO(3)](2-), where n = 11, 13, 15, etc., in addition to singly charged cluster ions that have been reported previously. The identity of the doubly charged clusters was determined by tandem mass spectrometry. Two-component NaNO(3)-KNO(3) salt solutions were observed to form cluster ions of the type [(NaNO(3))(i)(KNO(3))(j)NO(3)](-) in the negative ion mode and [(NaNO(3))(i)(KNO(3))(j)Na](+) and [(NaNO(3))(i)(KNO(3))(j)K](+) in the positive ion mode, where i+j 1, 2, 3... 10. Two-component solutions of KNO(3)-NaClO(4) formed ions of the type [(KNO(3))(i)(NaClO(4))(j)(KClO(4))(k)(NaNO(3))(l)K](+) and [(KNO(3))(i)(NaClO(4))(j)(KClO(4))(k)(NaNO(3))(l)Na](+) in the positive ion mode, where i + j + k + I = 1, 2, 3... 10. Similar clusters containing excess nitrate and perchlorate to provide the charge are formed in the negative ion mode. In each case, the maximum number of spectral lines for a cluster of size n can be calculated as the number of combinations of n(th) order (where n = i + j) of N different cation-anion pairs taken with replication and without regard for the ordering of the N cation-anion pairs. The actual number of lines observed may be reduced due to degeneracy of nominal m/z values for some ions. Copyright (c) 2006 John Wiley & Sons, Ltd.
Rapid Communications in Mass Spectrometry
"Analysis of oxidizer salt mixtures by electrospray ionization mass spectrometry" (2006). Faculty Bibliography 2000s. 6585.